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本节课是学生第一次认识几何图形——角,角对于小学生来说是很抽象的,特别是角的大小比较,更是这部分知识的难点。如果教师不能了解学生的现有知识水平、思维水平,那么这节课将很难上好。 案例: 师:(出示钟表)请同学们找一找,钟面上有角吗? 生:时针和分针组成角。 师:我会变魔术,请同学们仔细观察,老师能把角变大,还能把角变小。
This lesson is the first time students understand geometry - angle, angle is very abstract for primary school students, especially the size of the corner is more difficult for this part of knowledge. If the teacher can not understand the student's current level of knowledge, the level of thinking, then this class will be hard to be good. Case: Teacher: (Show clocks) Please look for a look students, the clock surface angle it? Health: hour and minute hands form a corner. Teacher: I will become magic, please carefully observe the students, the teacher can angle larger, but also smaller angle.